Pot stacking device



FIG. 1 is an environmental perspective view of a pot stacking device with the broken line showing of two pots being for illustrative purposes and forming no part of the claimed design;

FIG. 2 is a perspective view of a second embodiment of the design shown in FIG. 1;

FIG. 3 is a perspective view of the design shown in FIG. 1;

FIG. 4 is a side view of the device resting on its flat side.

FIG. 5 is a plan view of the top and bottom of the device.

FIG. 6 is a front elevation thereof; and,

FIG. 7 is a rear elevation thereof. 

The ornamental design for a pot stacking device, as shown and described. 